Terminal check-valve for force-feed lubricating systems.



L. DECK.

Y TERMINAL CHECK VALVE FOR FORCE FEED LUBRICATSNG SYSTEMS.

APPLICATION FILED OCT. 22. I913.

1,270,125. Patel lted June 18, 1918.

fijl zisAiivrngsl QM WMAJ UNITED STATES PATENT OFFICE.

LOUIS DECK, OF FORT WAYNE, INDIANA, ASSIGNOR TO McCORD AND COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

TERMINAL CHECK-VALVE FOR FORCE-FEED LUBRICATING SYSTEMS.

Application filed October 22, 1913.

To all whom it may concern:

Be it known that I. LOUIS DECK, a citizen 4 to which it appertains to make and use the same.

My invention relates to force'feed lubricating systems such as used on locomotives and elsewhere, and has for its object to provide an improved terminal check valve therefor.

In the accompanying drawings which illustrate my improved check valve applied to the lubricating system of a locomotive, like characters indicate like parts throughout the several views.

' teferring to the drawings:

Figure 1 is a view in sideelevation showing a locomotive diagrammatically, and shown as applied thereto, a force :t'eed lubricating system including my improved terminal check valve;

Fig. 2 is a side elevation of the terminal check valve showing the same removed from the locomotive and lubricating system; and

Fig. 3 is a vertical section taken centrally through the check valve, on the line m m of Fig. 2.

()l the parts of the locomotive it is only desirable for the purposes of this case to particularly note the boiler 1, cab 2, cylinders 3, and the steam chest 4. ()t' the, parts of the lubricatingsystem, it is only necessary to note the force feed lubricator proper (which includes the pump), indicated as an entirety by the numeral and one 01 the oil delivery pipes 6, which parts may be of the usual or any suitable construction, in which the oihtlelivery pipe is arranged to deliver to the cooperating steam chest 4 under the required high pressure. The delivery end of the oil pipe 6 iseonnected to the threaded nipple 7 ot' a two-part casing 8-9 of the terminal check valve. The case section 8 is provided with a depending threaded nipple 10 that is adapted to be screwed into the steam chest of the locomotive. Sections 7--8 are connected by threaded engagement and they clamp between Specification of Letters Patent.

4 Patented June 18, 1918.

Serial 110,796,642.

them, with an oil tight joint, a diaphragm 11. Between the sections 89, and below the diaphragm 11, is an oil chamber 12. A discharge port 13 extends downward from the chamber 12, through the depending nipple 10 and opens into the -steam chest. The discharge port 13 is obliquely extended at its upper portion, and at the junction of its vertical portion is formed a valve seat 14. This valve seat 14 is adapted to be engaged by the conical lower end of a discharge valve 15 of the pin or needle type. that is secured to and moved by the diaphragm 11. As shown, the valve 15 is provided with a threaded stem 16 that extends axially through the diaphragm, and with a llange 17 lhat engages the said diaphragm. A nut 18 is screwed onto the threaded stem 18 of the feed valve 15 and clamps the diaphragm tightly against the flange 17. The nut 18 works in the lower portion of a sleeve-like vertical extension 19 of the upper casing section 9. Working with threaded engagement with the upper end of the sleeve extension 19 is an adjusting screw 20 in the form of a plug that is adapted to be locked in any set adjustment by a lock nut '21 having threaded engagement therewith and impinging against the upper end of the said sleeve eX- tension. A coiled spring 22 is compressed between the adjusting screw 20 and the valve nut 18.

An inlet port 23 extends axially inward through the sleeve 7, and thence upward into the chamber 12. but just below said chamber it: is formed with a valve seat 24 that is normally engaged by a check valve preferably in the form of a ball that is held downward by gravity and by a lightcoiled spring 26, which spring, as shown, is compressed between the said valve and the diaphragm 11.

Operation.

phragni 11 is deflected upvvardand pin valve: 15 is raised ofi its. seat 14, allowing the'oil in chain er 1?:-

flo w down through port l3., V i 5' i In common locomotive practice, the steam ressure is 200pounds.-. -With this pressure in: the port 13 thehigher pressure of oil, namely, 250 pounds, forces the oil into the steam. When the. engine is running and lothellubricator is working, and there-'is-no fsteamtrin the steam chest, the-oil follows the ."sa'me Scourse described abovefand when f.-tlie pressure {of oil in the chamber 12 exceeds 250 Ip0u'nds, the pin valve raises and '1 fi th e oil is dlscharged as above. In this case,

' hovvever',"itis dischargedagainst zero steam.

pressure. I

, h h i bj et therball check 25 is not to."

' control the pressure, of oil in the conduit 23, 'b1"1t to merely act as a precautionary check, The reason'that thistype ofdia-j phragm' check valve'iscapable of-niaintaii'iing a practically constant pressure in the oil delivery. line, regardless of the steam pres- 25 sure against which it is operating, lies in the factthat the'area of the pin valve exposed.

to-i the steam .pressure in; port '13 is' very thateven when the oil is pumped against full'boiler pressure, the total upward force -V of the steam against the bottom of the pin or needle valve, is less than one 'pound,so' u that when the valve is delivering oil against fullsteam. pressure, the pressure of the oil WhatIclaimisz' 1 valve comprising a casing having'an oil chamber with inlet and in conduit23 Will be. less than the 250 10111165 I forwhich the spring 22 is set, but an amount equal to the steam pressure multiplied by I the small exposed areao'fthe said pin valve. Hence, the said valvemaintains a'pressure of250 pounds in-the oil pipe, While delivering-agalnst no steam'pressure, and maintains a pressure of more than249 pounds when delivering against full steam pressure.-

- 1. 'A; terminal check outlet ports, a spring-pressed diaphragm in said oil chamber, a valve no'rmally closing said discharge port and-having a connection to said diaphragm, .whereby"it .is arrangedtobe moved thereby, a check'valve in said inlet port, and a spring compressed-between said check valve-and saiddiaphragin;

eov- '2, A terminalcheck valve comprising a two-part casi'ngformed with an oil chamber andyifilet and outlet ports leading thereto and therefrom, a diaphragm clamped between the sections ofsaid casing and exposed to the oiL-press'ure within'said chamber, a

pinvalve attached to said'diaphragm and normally closing said outlet port, a spring adjusting plug adjustably applied to one of the case sections, a springcompressed be v tween said adjusting. plug and said dia-.

phragm and exerting a force tending to hold said valve closed, a eheck valve in said inlet port, and a coiled spring compressed be tween said check valve and said diaphragm.

' testimony whereof I" afiix-my signature in presence of'twowitnesses LOUISDECKQ' Witnesses:

W. J. Someone, [0, NE L 

